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PDF IDT5V928 Data sheet ( Hoja de datos )

Número de pieza IDT5V928
Descripción 8 OUTPUT CLOCK GENERATOR
Fabricantes IDT 
Logotipo IDT Logotipo



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IDT5V928
8 OUTPUT CLOCK GENERATOR
8 OUTPUT
CLOCK GENERATOR
INDUSTRIALTEMPERATURERANGE
IDT5V928
FEATURES:
• 3V to 3.6V operating voltage
• 50MHz to 160MHz output frequency range
• Input from fundamental crystal oscillator or external source
• Internal PLL feedback (loading feedback output relative to
other outputs, adjusts propagation delay between REF inputs
and outputs)
• Select inputs (S[1:0]) for FB divide selection (multiply ratio of 2,
3, 4, 4.25, 5, 6, 6.25, and 8)
• Low jitter
• PLL bypass for testing and power-down control (S1 = H, S0 = H,
powers part down <500µA)
• Available in TSSOP package
DESCRIPTION:
The IDT5V928 is a low-cost, low skew, low jitter, and high-performance
clock synthesizer. It has been specially designed to interface with Gigabit
Ethernet (125MHz), Fibre CHannel (106.25MHz), and OC-3 (155.52MHz)
applications. It can be programmed to provide output frequencies ranging
from 50MHz to 160MHz, with input frequencies ranging from 6.25MHz to
80MHz.
The IDT5V928 includes an internal RC filter that provides excellent jitter
characteristics and eliminates the need for external components. When
using the optional crystal input, the chip accepts a 10 - 40MHz fundamental
mode crystal with a maximum equivalent series resistance of 50.
APPLICATIONS:
• Gigabit ethernet
• Router
• Network switches
• SAN
• Instrumentation
• Fibre channel
FUNCTIONAL BLOCK DIAGRAM
VCO DIVIDE
1/N
OE
REF
PHASE
DETECTOR
CHARGE
PUMP
LOOP
FILTER
VCO
0
1
X2
CRYSTAL
OSCILLATOR
X1
SELECT MODE
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
c 2003 Integrated Device Technology, Inc.
S1 S0
1
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
FEBRUARY 2003
DSC 5854/5

1 page




IDT5V928 pdf
IDT5V928
8 OUTPUT CLOCK GENERATOR
AC TEST LOADS AND WAVEFORMS
VDD
OUTPUT
15pF
150
150
INDUSTRIALTEMPERATURERANGE
AC Test Load
2V
VTH = VDD/2
0.8
0V
1ns
3V
1ns
Input Test Waveform
2V
VTH = VDDQ/2
0.8
0V
VDDQ
tR tF
Output Waveform
5

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